Had mine rebuilt some 15 years ago, thought about a Pertronix back the , but desired to have the rebuild, had new points and condenser, once timing reset, new plugs and new plug wires it has performed flawlessly. Did have Joe Alexander adjust the linkage back a Virginia PUD some years ago, and engine even improved performance. So I think that if you really look at you distributor for play in the shaft you might consider, rebuild, replacement with rebuild.